JP6393694B2 - Stirring blade and stirring device - Google Patents

Stirring blade and stirring device Download PDF

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Publication number
JP6393694B2
JP6393694B2 JP2015554643A JP2015554643A JP6393694B2 JP 6393694 B2 JP6393694 B2 JP 6393694B2 JP 2015554643 A JP2015554643 A JP 2015554643A JP 2015554643 A JP2015554643 A JP 2015554643A JP 6393694 B2 JP6393694 B2 JP 6393694B2
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blade
stirring
support portion
blade portion
support
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JPWO2015098290A1 (en
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昌二 森永
昌二 森永
和晃 川上
和晃 川上
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Sumitomo Heavy Industries Process Equipment Co Ltd
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Sumitomo Heavy Industries Process Equipment Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/111—Centrifugal stirrers, i.e. stirrers with radial outlets; Stirrers of the turbine type, e.g. with means to guide the flow
    • B01F27/1111—Centrifugal stirrers, i.e. stirrers with radial outlets; Stirrers of the turbine type, e.g. with means to guide the flow with a flat disc or with a disc-like element equipped with blades, e.g. Rushton turbine
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
    • B01F23/2336—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the location of the place of introduction of the gas relative to the stirrer
    • B01F23/23362—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the location of the place of introduction of the gas relative to the stirrer the gas being introduced under the stirrer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/114—Helically shaped stirrers, i.e. stirrers comprising a helically shaped band or helically shaped band sections
    • B01F27/1144—Helically shaped stirrers, i.e. stirrers comprising a helically shaped band or helically shaped band sections with a plurality of blades following a helical path on a shaft or a blade support

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)

Description

関連出願の相互参照Cross-reference of related applications

本願は、日本国特願２０１３−２７０３１１号に基づく優先権を主張し、引用によって本願明細書の記載に組み込まれる。   This application claims the priority based on Japanese Patent Application No. 2013-270411, and is incorporated into the description of this specification by reference.

本発明は、混合を目的とした撹拌翼及びこれを備えた撹拌装置に関する。   The present invention relates to a stirring blade for mixing and a stirring device including the stirring blade.

従来、被撹拌物を撹拌する撹拌装置として、例えば円筒形状の撹拌槽と、該撹拌槽の中心部に配された撹拌軸と、該撹拌軸の下部側に取り付けられた撹拌翼とを備えたものが知られている。   Conventionally, as a stirring device for stirring an object to be stirred, for example, a cylindrical stirring tank, a stirring shaft arranged at the center of the stirring tank, and a stirring blade attached to the lower side of the stirring shaft are provided. Things are known.

また、この種の撹拌装置に備えられた撹拌翼としては、撹拌軸に取り付けられる板状部材と、該板状部材の外周側に固定された複数枚の平板状の羽根部とを備えたものが知られている。かかる撹拌装置によれば、撹拌軸が軸芯を中心に回転すると、撹拌翼が撹拌軸と共に回転し、この回転により、被撹拌物が撹拌されて混合される。   In addition, the stirring blade provided in this type of stirring device includes a plate-like member attached to the stirring shaft, and a plurality of plate-like blade portions fixed to the outer peripheral side of the plate-like member. It has been known. According to such a stirring device, when the stirring shaft rotates around the shaft core, the stirring blade rotates together with the stirring shaft, and the object to be stirred is stirred and mixed by this rotation.

しかし、このような撹拌翼を用いて被撹拌物の撹拌を行った場合、平板状の羽根部の裏側に大量のキャビティが生じることがある（キャビテーション）。そうすると、撹拌効率が低下するおそれがある。   However, when the object to be stirred is stirred using such a stirring blade, a large amount of cavities may be formed on the back side of the flat blade portion (cavitation). If it does so, there exists a possibility that stirring efficiency may fall.

そこで、羽根部の縦断面が該羽根部の反回転方向に向かって湾曲及び／または屈曲した形状を有するように構成された撹拌翼が提案されている（日本国特開２００４−３５７２４号公報参照）。かかる撹拌翼によれば、キャビテーションが抑制される。   In view of this, a stirring blade is proposed in which the longitudinal section of the blade portion is curved and / or bent toward the counter-rotating direction of the blade portion (see Japanese Patent Application Laid-Open No. 2004-35724). ). According to such a stirring blade, cavitation is suppressed.

日本国特開２００４−３５７２４号公報Japanese Unexamined Patent Publication No. 2004-35724

しかし、日本国特開２００４−３５７２４号公報に示すような撹拌翼でも、羽根部の裏側にはキャビテーションが発生している。このため、キャビテーションの抑制が未だ十分とはいえない。また、撹拌翼が被撹拌物から受ける抵抗が比較的大きいため、その分だけ大きな駆動力を要する。このように、上記撹拌翼は、撹拌効率が十分とはいえず、撹拌効率がさらに向上された撹拌翼が要望されている。   However, even with a stirring blade as shown in Japanese Patent Application Laid-Open No. 2004-35724, cavitation occurs on the back side of the blade portion. For this reason, the suppression of cavitation is still not sufficient. Moreover, since the resistance which a stirring blade receives from a to-be-stirred object is comparatively large, the driving force corresponding to that much is required. Thus, the stirring blade cannot be said to have sufficient stirring efficiency, and a stirring blade with further improved stirring efficiency is desired.

本発明は、上記問題点に鑑み、撹拌効率が向上された撹拌翼及びこれを備えた撹拌装置を提供することを課題とする。   In view of the above problems, an object of the present invention is to provide a stirring blade having improved stirring efficiency and a stirring device including the stirring blade.

本発明に係る撹拌翼は、撹拌装置に備えられた撹拌軸に取り付けられる撹拌翼であって、前記撹拌軸に取り付けられる板状の支持部と、該支持部の外周縁側に配された複数の羽根部とを備え、前記支持部は、第１の面と第２の面とを有し、前記各羽根部は、前記支持部における前記第１の面及び前記第２の面のうちの一方の面から突出する第１の羽根部と、前記支持部における前記第１の面及び前記第２の面のうちの他方の面から突出するとともに、第１の羽根部とは非対称とされる第２の羽根部と、前記第１の羽根部と前記第２の羽根部の少なくとも一方に形成される開口部とを含み、前記開口部は、前記第１の羽根部または前記第２の羽根部の根元側かつ径外側の所定領域が切り取られて形成され、被撹拌物が通過する空間を有する。 A stirring blade according to the present invention is a stirring blade attached to a stirring shaft provided in a stirring device, and includes a plate-like support portion attached to the stirring shaft, and a plurality of disposed on the outer peripheral edge side of the support portion. A blade portion, and the support portion has a first surface and a second surface, and each blade portion is one of the first surface and the second surface of the support portion. A first blade portion protruding from the surface of the first support portion, and a first blade portion protruding from the other surface of the first surface and the second surface of the support portion, and asymmetric with respect to the first blade portion. and 2 of the blade section, said saw including an opening formed on at least one of the first blade portion and the second blade portion, said opening portion, said first blade portion and the second blade A predetermined region on the base side and the outer side of the part is cut out to form a space through which the agitated object passes .

また、本発明に係る撹拌翼は、撹拌装置に備えられた撹拌軸に取り付けられる撹拌翼であって、前記撹拌軸に取り付けられる板状の支持部と、該支持部の外周縁側に配された複数の羽根部とを備え、前記支持部は、第１の面と第２の面とを有し、前記各羽根部は、前記支持部における前記第１の面及び前記第２の面のうちの一方の面から突出する第１の羽根部と、前記支持部における前記第１の面及び前記第２の面のうちの他方の面から突出するとともに、第１の羽根部とは非対称とされる第２の羽根部と、前記第１の羽根部と前記第２の羽根部の少なくとも一方に形成される開口部とを含み、前記支持部は円形に構成され、前記複数の羽根部は、支持部の円周方向に沿って所定の間隔をおいて設けられており、前記支持部の円周方向において隣り合う２つの羽根部のうち、一方の羽根部における前記第１の羽根部が前記支持部の第１の面に設けられるとともに、他方の羽根部における前記第１の羽根部が前記支持部の第２の面に設けられ、前記一方の羽根部における前記第２の羽根部が前記支持部の第２の面に設けられるとともに、前記他方の羽根部における前記第２の羽根部が前記支持部の第１の面に設けられることができる。 Further, the stirring blade according to the present invention is a stirring blade attached to the stirring shaft provided in the stirring device, and is disposed on the plate-like support portion attached to the stirring shaft and the outer peripheral side of the support portion. A plurality of blade portions, wherein the support portion has a first surface and a second surface, and each of the blade portions includes the first surface and the second surface of the support portion. The first blade portion protruding from one surface of the first protrusion and the other surface of the first surface and the second surface of the support portion, and asymmetric with the first blade portion. A second blade portion, an opening formed in at least one of the first blade portion and the second blade portion , the support portion is configured in a circular shape, and the plurality of blade portions are: The support portion is provided at a predetermined interval along the circumferential direction of the support portion. Of the two adjacent blade portions, the first blade portion in one blade portion is provided on the first surface of the support portion, and the first blade portion in the other blade portion is the support portion of the support portion. The second blade portion in the one blade portion is provided on the second surface of the support portion, and the second blade portion in the other blade portion is the support portion. Can be provided on the first surface.

また、非対称とされる第１の羽根部と第２の羽根部について、例えば、第１の羽根部が直線形状に形成され、第２の羽根部が湾曲形状に形成される構成を採用してもよい。   For the first blade portion and the second blade portion that are asymmetric, for example, a configuration in which the first blade portion is formed in a linear shape and the second blade portion is formed in a curved shape is adopted. Also good.

図１は、本発明の第１実施形態に係る撹拌翼を備えた撹拌装置の概略縦断面図である。FIG. 1 is a schematic longitudinal sectional view of a stirring device including a stirring blade according to a first embodiment of the present invention. 図２の（ａ）部分は、本実施形態に係る撹拌翼の上面図である。図２の（ｂ）部分は、（ａ）部分のＸ−Ｘ矢視断面図である。Part (a) of FIG. 2 is a top view of the stirring blade according to the present embodiment. (B) part of FIG. 2 is XX arrow sectional drawing of the (a) part. 図３は、本実施形態に係る撹拌翼における、羽根部の一例を示す部分側面図である。FIG. 3 is a partial side view showing an example of a blade portion in the stirring blade according to the present embodiment. 図４の（ａ）部分は、性能試験に供した本実施形態に係る撹拌翼の上面図である。図４の（ｂ）部分は、（ａ）部分のＸ−Ｘ矢視断面図である。Part (a) of FIG. 4 is a top view of the stirring blade according to the present embodiment subjected to the performance test. (B) part of FIG. 4 is XX arrow sectional drawing of (a) part. 図５は、性能試験の試験データを示す。上側のグラフは、通気量とkLa（総括物質移動容量係数）との関係を示すグラフである。下側のグラフは、通気量と液体に伝達される動力（単位体積当たり）との関係を示すグラフである。FIG. 5 shows test data of the performance test. The upper graph is a graph showing the relationship between the air flow rate and kLa (overall mass transfer capacity coefficient). The lower graph is a graph showing the relationship between the air flow rate and the power (per unit volume) transmitted to the liquid.

以下、本発明の第１実施形態に係る撹拌翼について、これが備えられる撹拌装置と共に図１〜図３を参照しつつ説明する。なお、図１においては、撹拌翼４を破線で概略的に示し、図２、図３において、撹拌翼４を詳細に示す。   Hereinafter, the stirring blade according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 3 together with a stirring device provided with the stirring blade. In FIG. 1, the stirring blade 4 is schematically shown by a broken line, and in FIGS. 2 and 3, the stirring blade 4 is shown in detail.

本実施形態の撹拌翼４を備えた撹拌装置１は、竪型撹拌装置である。この撹拌装置１は、被撹拌物（液体Ｌ）を収容する撹拌槽２と、該撹拌槽２内に回転可能に取り付けられた撹拌軸３と、該撹拌軸３に取り付けられた撹拌翼４と、撹拌軸３を回転させる駆動部５とを備えている。また、撹拌装置１は、撹拌槽２の底部２２から撹拌槽２内に他の被撹拌物（気体Ｇ）を供給する気体供給部６をさらに備えている。なお、本実施形態では、撹拌槽２に収容された被撹拌物が液体Ｌ及び気体Ｇである。以下、気体Ｇを液体中に分散させる場合を例に挙げて説明するが、被撹拌物の種類は、特に限定されるものではない。また、液体Ｌには、比較的低粘度で流動性が高い液体の他、比較的高粘度で流動性が低い液体等も含まれる。   The stirring apparatus 1 provided with the stirring blade 4 of this embodiment is a vertical stirring apparatus. The stirring device 1 includes a stirring tank 2 that contains an object to be stirred (liquid L), a stirring shaft 3 that is rotatably mounted in the stirring tank 2, and a stirring blade 4 that is attached to the stirring shaft 3. And a drive unit 5 for rotating the stirring shaft 3. Further, the stirring device 1 further includes a gas supply unit 6 that supplies another stirring target (gas G) from the bottom 22 of the stirring tank 2 into the stirring tank 2. In the present embodiment, the objects to be stirred accommodated in the stirring tank 2 are the liquid L and the gas G. Hereinafter, although the case where gas G is disperse | distributed in a liquid is mentioned as an example and demonstrated, the kind of to-be-stirred thing is not specifically limited. The liquid L includes a liquid having a relatively low viscosity and high fluidity, and a liquid having a relatively high viscosity and low fluidity.

撹拌槽２は、縦方向に長い円筒形状に形成されている。具体的には、撹拌槽２は、円筒状の直胴部２１と、該直胴部２１の下端に取り付けられた断面形状が半楕円または皿型形状等とされた底部２２と、直胴部２１の上端に取り付けられた断面形状が半楕円または皿型状等とされた頂部２３とを備えている。また、撹拌槽２は、撹拌軸３の軸芯方向Ａが鉛直方向（図１の上下方向）と一致するように、撹拌軸３を保持している。   The stirring tank 2 is formed in a cylindrical shape that is long in the vertical direction. Specifically, the stirring tank 2 includes a cylindrical straight body portion 21, a bottom portion 22 having a semi-elliptical or dish-shaped cross section attached to the lower end of the straight body portion 21, and a straight body portion. The top part 23 with which the cross-sectional shape attached to the upper end of 21 was made into the semi-ellipse shape or the dish shape was provided. The stirring tank 2 holds the stirring shaft 3 so that the axial direction A of the stirring shaft 3 coincides with the vertical direction (the vertical direction in FIG. 1).

撹拌軸３は、撹拌槽２の中心部に配されている。撹拌軸３の下端部は、撹拌槽２の底部２２に設けられた軸受（不図示）を介して支持されている。一方、撹拌軸３の上端部は、撹拌槽２の頂部２３よりも上方まで延出され、該頂部２３よりも上方に配された駆動部５（ここでは、例えばモーターＭとする。）に接続されている。撹拌軸３は、かかる駆動部５の駆動を受けて回転する。なお、撹拌軸３として、その下端部が何にも支持されていない構成を採用してもよい。また、撹拌軸３の下端部が底部２２よりも下方まで延出され、該底部２２よりも下方に配された駆動部５と接続されている構成を採用してもよい。   The stirring shaft 3 is disposed at the center of the stirring tank 2. The lower end of the stirring shaft 3 is supported via a bearing (not shown) provided on the bottom 22 of the stirring tank 2. On the other hand, the upper end portion of the stirring shaft 3 extends to the upper side from the top portion 23 of the stirring tank 2 and is connected to a drive unit 5 (here, for example, a motor M) disposed above the top portion 23. Has been. The stirring shaft 3 rotates upon receiving the drive of the driving unit 5. In addition, you may employ | adopt the structure where the lower end part is not supported at all as the stirring shaft 3. FIG. Further, a configuration in which the lower end portion of the agitation shaft 3 extends below the bottom portion 22 and is connected to the driving unit 5 disposed below the bottom portion 22 may be adopted.

図２、図３に示すように、撹拌翼４は、撹拌軸３に取り付け可能な円筒状のボス４１と、該ボス４１から撹拌軸３の径方向Ｂに延出している平板状で円形（円盤状又はドーナツ状）の支持部４２と、該支持部４２の周縁部（外周縁側）に取り付けられた複数の羽根部４３とを備えている。支持部４２と、ボス４１及び羽根部４３とは、それぞれ溶接等によって固定されている。   As shown in FIGS. 2 and 3, the stirring blade 4 includes a cylindrical boss 41 that can be attached to the stirring shaft 3, and a flat and circular shape extending from the boss 41 in the radial direction B of the stirring shaft 3 ( A support portion 42 having a disk shape or a donut shape, and a plurality of blade portions 43 attached to the peripheral portion (outer peripheral edge side) of the support portion 42. The support portion 42, the boss 41, and the blade portion 43 are each fixed by welding or the like.

図２の（ａ）部分に示すように、ボス４１は、撹拌軸３に挿通される貫通孔４１ａを有している。撹拌翼４は、該ボス４１の貫通孔４１ａには撹拌軸３が挿通される。撹拌翼４は、ボス４１と撹拌軸３とがねじ締結される、または溶接されること等によって、撹拌軸３に取り付けられるようになっている。   As shown in part (a) of FIG. 2, the boss 41 has a through hole 41 a inserted through the stirring shaft 3. In the stirring blade 4, the stirring shaft 3 is inserted into the through hole 41 a of the boss 41. The stirring blade 4 is attached to the stirring shaft 3 by screwing or welding the boss 41 and the stirring shaft 3.

支持部４２は、ボス４１が中心に位置するように該ボス４１の外周面から径方向Ｂの外周側に突出して形成されている。また、支持部４２は、撹拌軸３の軸芯方向Ａに対して直交するようにボス４１に固定されている。ボス４１の径方向Ｂにおける支持部４２の長さは、撹拌槽２の半径等に応じて適宜設計することができ、特に限定されるものではないが、例えば、撹拌槽２の直径の２０〜５０％程度とされ得る。   The support portion 42 is formed so as to protrude from the outer peripheral surface of the boss 41 to the outer peripheral side in the radial direction B so that the boss 41 is located at the center. The support portion 42 is fixed to the boss 41 so as to be orthogonal to the axial direction A of the stirring shaft 3. The length of the support portion 42 in the radial direction B of the boss 41 can be appropriately designed according to the radius of the stirring tank 2 and the like, and is not particularly limited. It can be about 50%.

図２の（ａ）部分に示すように、複数（図例では６つ）の羽根部４３は、支持部４２の円周方向に沿って所定の間隔をおいて配置されている。各羽根部４３は支持部４２の外周縁から径外方向には飛び出さないように配置され、本実施形態では各羽根部４３の外周縁と支持部４２の外周縁とは平面視で一致している。図２の（ｂ）部分に示すように、羽根部４３は、支持部４２の一方の面である上面（第１の面）４２ａから突出するとともに、径方向視にて直線形状に形成される第１の羽根部４３ａと、支持部４２の他方の面である下面（第２の面）４２ｂから突出するとともに、径方向視にて湾曲形状に形成される第２の羽根部４３ｂとを有している。また、羽根部４３の一端側は支持部４２に固定され、羽根部４３の他端側は支持部４２からある間隔をもって配置されている。そして、支持部４２は、羽根部４３が解放されている側に向かって回転される。   As shown in part (a) of FIG. 2, a plurality (six in the illustrated example) of blade portions 43 are arranged at a predetermined interval along the circumferential direction of the support portion 42. Each blade portion 43 is arranged so as not to protrude radially outward from the outer peripheral edge of the support portion 42. In this embodiment, the outer peripheral edge of each blade portion 43 and the outer peripheral edge of the support portion 42 coincide with each other in plan view. ing. As shown in part (b) of FIG. 2, the blade portion 43 protrudes from the upper surface (first surface) 42 a which is one surface of the support portion 42 and is formed in a linear shape as viewed in the radial direction. The first blade portion 43a has a second blade portion 43b that protrudes from the lower surface (second surface) 42b, which is the other surface of the support portion 42, and has a curved shape when viewed in the radial direction. doing. Further, one end side of the blade portion 43 is fixed to the support portion 42, and the other end side of the blade portion 43 is disposed at a certain interval from the support portion 42. And the support part 42 is rotated toward the side by which the blade | wing part 43 is open | released.

第１の羽根部４３ａが径方向視にて直線形状に形成され、第２の羽根部４３ｂが径方向視にて湾曲形状に形成されていることから、両者４３ａ，４３ｂは支持部４２を基準として非対称な形状となっている。第１の羽根部４３ａは、支持部４２の厚さ方向における一方の面に固定されている。第２の羽根部４３ｂは、支持部４２の他方の面に固定されている。   Since the first blade portion 43a is formed in a linear shape when viewed in the radial direction and the second blade portion 43b is formed in a curved shape when viewed in the radial direction, both 43a and 43b are based on the support portion 42. As asymmetric shape. The first blade portion 43 a is fixed to one surface in the thickness direction of the support portion 42. The second blade portion 43 b is fixed to the other surface of the support portion 42.

第１の羽根部４３ａには、その一部に開口部４４を有する。この開口部４４は、図２に示すように、第１の羽根部４３ａの根元側かつ径外側の所定領域が直線状に切り取られて形成され、被撹拌物が通過する空間を有する。なお、この開口部４４は、第２の羽根部４３ｂに形成されていてもよい。すなわち、開口部４４は第１の羽根部４３ａと第２の羽根部４３ｂの少なくとも一方（一方又は両方）に形成され得る。第２の羽根部４３ｂは、径方向視にて円弧状の湾曲形状に形成される。この湾曲形状は、円弧状に限らず、例えば、複数の直線状の部分が繋がって形成されるものであってもよい。   The first blade portion 43a has an opening 44 in a part thereof. As shown in FIG. 2, the opening 44 is formed by cutting out a predetermined region on the base side and outside of the diameter of the first blade portion 43 a in a straight line, and has a space through which an object to be stirred passes. The opening 44 may be formed in the second blade portion 43b. That is, the opening 44 can be formed in at least one (one or both) of the first blade portion 43a and the second blade portion 43b. The second blade portion 43b is formed in an arcuate curved shape when viewed in the radial direction. The curved shape is not limited to an arc shape, and may be formed by connecting a plurality of linear portions, for example.

第２の羽根部４３ｂが有する、前記円弧状の湾曲形状は、具体的には、図２（ａ）に表された、後退角度αを示す一点鎖線と平行な関係にある二つの端縁間で、一定の曲率半径（例えば図４の（ｂ）部分に示す曲率半径ｍ５）で湾曲する形状である。なお、本実施形態の第２の羽根部４３ｂは一定の曲率半径ｍ５で湾曲しているがこれに限定されず、例えば部分によって異なる曲率半径で湾曲した形状とすることもできる。具体的には、第２の羽根部４３ｂの支持部４２に固定されている側から第２の羽根部４３ｂの端部側に向かって、部分的に曲率半径を異ならせた形状である。   Specifically, the arcuate curved shape of the second blade portion 43b is the distance between two edges that are parallel to the alternate long and short dash line that represents the receding angle α shown in FIG. Thus, the shape is curved with a certain radius of curvature (for example, the radius of curvature m5 shown in part (b) of FIG. 4). In addition, although the 2nd blade | wing part 43b of this embodiment is curving with the fixed curvature radius m5, it is not limited to this, For example, it can also be set as the shape curved with the curvature radius which changes with parts. Specifically, the curvature radius is partially changed from the side fixed to the support portion 42 of the second blade portion 43b toward the end portion side of the second blade portion 43b.

また、本実施形態の第２の羽根部４３ｂは、前記後退角度αを示す一点鎖線に沿う方向では同一の曲率半径で形成されているがこれに限定されず、前記方向で異なる曲率半径とされることができる。具体的には、第２の羽根部４３ｂにつき、支持部４２の外周側から支持部４２の中心側に向かって、曲率半径を変化させることもできる。   Further, the second blade portion 43b of the present embodiment is formed with the same radius of curvature in the direction along the alternate long and short dash line indicating the receding angle α, but is not limited to this, and the radius of curvature is different in the direction. Can. Specifically, the radius of curvature of the second blade portion 43 b can be changed from the outer peripheral side of the support portion 42 toward the center side of the support portion 42.

また、第２の羽根部４３ｂにおける曲率半径の中心側は、図４に示すように、第１の羽根部４３ａ側、すなわち、支持部４２側に位置している。つまり、第２の羽根部４３ｂは支持部４２に対して凹となる形状である。第２の羽根部４３ｂは、曲率半径の中心側が支持部４２側にされ、第２の羽根部４３ｂの有する曲面が支持部４２から離れる方向に突出するように形成されるので、支持板４２が図示矢印方向（第２の羽根部４３ｂの端部側方向）に回転した際、第１の羽根部４３ａの外周部を通過する被撹拌物の剥離渦が起こりにくくなる。   Further, as shown in FIG. 4, the center side of the radius of curvature of the second blade portion 43b is located on the first blade portion 43a side, that is, on the support portion 42 side. That is, the second blade portion 43 b has a concave shape with respect to the support portion 42. The second blade portion 43b is formed so that the center side of the radius of curvature is on the support portion 42 side and the curved surface of the second blade portion 43b protrudes away from the support portion 42, so that the support plate 42 is formed. When rotating in the direction indicated by the arrow (in the direction of the end of the second blade portion 43b), a separation vortex of the agitated material passing through the outer peripheral portion of the first blade portion 43a is less likely to occur.

図２の（ｂ）部分における羽根部４３と円周方向に隣り合う他の羽根部４３とは、第１の羽根部４３ａと第２の羽根部４３ｂの位置が逆になっている。より具体的には、隣り合う２つの羽根部４３のうち、一方の羽根部４３（図２の（ｂ）部分に示す羽根部４３）は、第１の羽根部４３ａが支持部４２の第１の面４２ａに形成されているが、他方の羽根部４３の場合、第２の羽根部４３ｂが支持部４２の第１の面４２ａに形成されることになる。同様に、一方の羽根部４３の第２の羽根部４３ｂが支持部４２の第２の面４２ｂに形成されているが、他方の羽根部４３の場合には、第１の羽根部４３ａが支持部４２の第２の面４２ｂに形成されることになる。   The position of the 1st blade | wing part 43a and the 2nd blade | wing part 43b is reverse with the blade | wing part 43 in the part (b) of FIG. 2 and the other blade | wing part 43 adjacent to the circumferential direction. More specifically, of the two adjacent blade portions 43, one blade portion 43 (the blade portion 43 shown in the portion (b) of FIG. 2) is the first blade portion 43 a of the first support portion 42. In the case of the other blade portion 43, the second blade portion 43 b is formed on the first surface 42 a of the support portion 42. Similarly, the second blade portion 43b of one blade portion 43 is formed on the second surface 42b of the support portion 42. In the case of the other blade portion 43, the first blade portion 43a is supported. It is formed on the second surface 42b of the portion 42.

また、第１の羽根部４３ａまたは第２の羽根部４３ｂの間における開口部４４の配置及び大きさも、特に限定されるものではなく、キャビテーションの抑制及び羽根部４３の強度低下の抑制が図られるように、適宜設定することができる。例えば、開口部４４を第１の羽根部４３ａまたは第２の羽根部４３ｂにおける先端側に形成したり、径内側に形成したりすることもできる。また本実施形態では、開口部４４が直線状に切り取られて形成されているが、曲線状に切り取られて形成されることもできる。また、周囲が囲まれた孔として開口部４４を形成することもできる。また本実施形態では、第１の羽根部４３ａの１枚当たりで開口部４４が１個形成されているが、複数形成することもできる。また、格子状や網状に開口部４４を形成することもできる。なお、開口部４４は大きく形成した方が撹拌翼４の駆動力（駆動トルク）を低減できる。   Further, the arrangement and size of the opening 44 between the first blade portion 43a or the second blade portion 43b are not particularly limited, and suppression of cavitation and reduction in strength of the blade portion 43 can be achieved. Thus, it can be set as appropriate. For example, the opening 44 can be formed on the tip side of the first blade portion 43a or the second blade portion 43b, or can be formed on the inner side of the diameter. In the present embodiment, the opening 44 is formed by being cut out in a straight line shape, but may be formed by being cut out in a curved line shape. The opening 44 can also be formed as a hole surrounded by the periphery. In the present embodiment, one opening 44 is formed for each first blade 43a, but a plurality of openings 44 may be formed. Further, the openings 44 can be formed in a lattice shape or a net shape. Note that the driving force (driving torque) of the stirring blade 4 can be reduced by forming the opening 44 larger.

羽根部４３は、支持部４２の径方向Ｂに対して回転方向下流側に傾斜して配されている。かかる下流側への傾斜角度、すなわち、羽根部４３の内周側が後退している角度（後退角度）αは、例えば１０〜４０°に設定することができる。なお、径方向に対して羽根部４３を傾斜させない構成を採用することも、羽根部４３の内周側が前進しているような構成を採用することもできる。   The blade portion 43 is disposed to be inclined downstream in the rotational direction with respect to the radial direction B of the support portion 42. Such an inclination angle toward the downstream side, that is, an angle (retraction angle) α at which the inner peripheral side of the blade portion 43 is retreated can be set to 10 to 40 °, for example. In addition, the structure which does not incline the blade | wing part 43 with respect to radial direction can also be employ | adopted, and the structure where the inner peripheral side of the blade | wing part 43 is advancing can also be employ | adopted.

続いて、本実施形態の撹拌翼４を備えた撹拌装置１の作用について説明する。まず、撹拌装置１の駆動部５を駆動して、第１及び第２の羽根部４３ａ、４３ｂが傾斜して突出している側が下流側となる方向（図２の（ａ）部分の反時計回り）に撹拌軸３を回転させると、撹拌槽２内において撹拌軸３を中心として、且つ該撹拌軸３と共に撹拌翼４が回転する。撹拌翼４が回転すると、第１の羽根部４３ａと、第２の羽根部４３ｂとによって液体Ｌ及び気体Ｇがせん断されつつ混合される。   Then, an effect | action of the stirring apparatus 1 provided with the stirring blade 4 of this embodiment is demonstrated. First, the drive unit 5 of the agitator 1 is driven, and the direction in which the first and second blade portions 43a and 43b are inclined and projecting is the downstream side (counterclockwise in the portion (a) of FIG. When the stirring shaft 3 is rotated, the stirring blade 4 rotates around the stirring shaft 3 in the stirring tank 2 and together with the stirring shaft 3. When the stirring blade 4 rotates, the liquid L and the gas G are mixed while being sheared by the first blade portion 43a and the second blade portion 43b.

このように撹拌翼４が回転したとき、羽根部４３の回転方向下流側（前側）から上流側（後側）に向かって液体Ｌ及び気体Ｇ（被撹拌物）が開口部４４を通過する。また、第１の羽根部４３ａ及び第２の羽根部４３ｂと、支持部４２との隙間部分Ｓの被撹拌物が遠心力で開口部４４へと移動した後、上記開口部４４を通過する被撹拌物に合流して、羽根部４３よりも外周側に分散される。前記のように、被撹拌物を遠心力による移動の後に合流させられることから、開口部４４は、羽根部４３の径外側の所定領域に形成することが好ましい。   When the stirring blade 4 rotates in this way, the liquid L and the gas G (agitated object) pass through the opening 44 from the downstream side (front side) in the rotation direction of the blade part 43 toward the upstream side (rear side). Further, the object to be stirred in the gap portion S between the first blade portion 43a and the second blade portion 43b and the support portion 42 moves to the opening portion 44 by centrifugal force, and then passes through the opening portion 44. It merges with the agitated material and is dispersed on the outer peripheral side with respect to the blade portion 43. As described above, since the objects to be stirred are merged after being moved by the centrifugal force, the opening 44 is preferably formed in a predetermined region outside the diameter of the blade portion 43.

上記の通り、本実施形態の撹拌翼４は、支持部４２と羽根部４３とを備えている。羽根部４３は、第１の羽根部４３ａと、第２の羽根部４３ｂと、開口部４４とを有する。   As described above, the stirring blade 4 of this embodiment includes the support portion 42 and the blade portion 43. The blade portion 43 includes a first blade portion 43a, a second blade portion 43b, and an opening 44.

かかる構成によれば、上述したように、撹拌翼４の羽根部４３が開口部４４を有していることによって、キャビテーションが抑制される。加えて、かかる撹拌効率の向上によって、撹拌軸３の駆動に要する駆動力が低減されるため、撹拌軸３を比較的細くしたり、駆動部５を比較的小型化したりすることも可能となる。また、コストも低減される。また、従来よりも低トルクで高速回転での運転も可能となる。   According to this configuration, as described above, the cavitation is suppressed because the blade portion 43 of the stirring blade 4 has the opening 44. In addition, since the driving force required for driving the stirring shaft 3 is reduced by the improvement of the stirring efficiency, the stirring shaft 3 can be made relatively thin, and the drive unit 5 can be made relatively small. . Also, the cost is reduced. In addition, it is possible to operate at a high speed with lower torque than in the prior art.

また、本実施形態においては、第１の羽根部４３ａと、第２の羽根部４３ｂが径方向視にて非対称に形成されている。さらに、円周方向に隣り合う２つの羽根部４３のうち、一方の羽根部４３における第１の羽根部４３ａが支持部４２の第１の面４２ａに設けられるとともに、他方の羽根部４３における第１の羽根部４３ａが支持部４２の第２の面４２ｂに設けられ、一方の羽根部４３における第２の羽根部４３ｂが支持部４２の第２の面４２ｂに設けられるとともに、他方の羽根部４３における第２の羽根部４３ｂが支持部４２の第１の面４２ａに設けられている。そして、各第１の羽根部４３ａには開口部４４が形成されている。   Moreover, in this embodiment, the 1st blade | wing part 43a and the 2nd blade | wing part 43b are formed asymmetrically by radial direction view. Further, of the two blade portions 43 adjacent to each other in the circumferential direction, the first blade portion 43a in one blade portion 43 is provided on the first surface 42a of the support portion 42, and the first blade portion 43 in the other blade portion 43 has a first shape. One blade portion 43a is provided on the second surface 42b of the support portion 42, and the second blade portion 43b of the one blade portion 43 is provided on the second surface 42b of the support portion 42 and the other blade portion. A second blade portion 43 b in 43 is provided on the first surface 42 a of the support portion 42. An opening 44 is formed in each first blade 43a.

かかる構成によれば、仮に大量のガス存在下でキャビティが発生しても、隣り合う羽根部４３の背面側のガス溜まり（キャビティ）が結合しにくくなる。したがって、例えば液体中にガスが大量に存在する場合においても動力低下及び撹拌性能の低下を抑えることが可能となる。   According to such a configuration, even if a cavity is generated in the presence of a large amount of gas, the gas reservoir (cavity) on the back side of the adjacent blade portion 43 is hardly coupled. Therefore, for example, even when a large amount of gas is present in the liquid, it is possible to suppress a decrease in power and a decrease in stirring performance.

また、上記の構成にすることにより、開口部４４は、隣り合う２つの羽根部４３のうち、一方の羽根部４３においては、上側の第１の羽根部４３ａに形成され、他方の羽根部４３においては、下側の第１の羽根部４３ａに形成されることになる。このように、開口部４４が上下交互に配置されることにより、羽根部４３の近傍に発生するガス溜まりを上下方向で分散することが可能となる。これによって、フラッディングが発生しにくくなる。フラッディングとは、羽根部４３の近傍で隣り合うガス溜まりが結合し、羽根部４３の機能が大幅に低下する現象である。 Further, with the above configuration, the opening 44 is formed in the upper first blade portion 43 a in one blade portion 43 of the two adjacent blade portions 43, and the other blade portion 43. Is formed on the lower first blade portion 43a. Thus, by arranging the openings 44 alternately in the vertical direction, it is possible to disperse gas reservoirs generated in the vicinity of the blades 43 in the vertical direction. This makes it difficult for flooding to occur. The flooding is a phenomenon in which the gas reservoirs adjacent to each other in the vicinity of the blade portion 43 are combined to greatly reduce the function of the blade portion 43.

また、開口部４４を上下交互に配置することで、流体の流れを一点に集中させることなく分散させることが可能になる。これにより、伝熱面での流速分布をより均等化でき、伝熱性能の向上が図られる。また、腐食性が高い機器において本発明が適用される場合には、流体の流れの一点集中化によるエロージョンの誘発をも防止できるようになる。   Further, by arranging the openings 44 alternately in the upper and lower directions, it becomes possible to disperse the fluid flow without concentrating it on one point. Thereby, the flow velocity distribution on the heat transfer surface can be made more uniform, and the heat transfer performance can be improved. In addition, when the present invention is applied to a highly corrosive device, it is possible to prevent the induction of erosion due to a single concentration of fluid flow.

次に、本実施形態の撹拌翼４に関して発明者が性能試験を行ったので、試験データを以下に示す。   Next, since the inventor performed a performance test on the stirring blade 4 of the present embodiment, test data is shown below.

試験条件は以下の通りである。
試験槽 ： 透明アクリル槽（槽内径310mm、2:1半楕円ボトム）
翼種 ： 本実施形態の撹拌翼、（比較対象）汎用ディスクタービン翼
翼径124mm（槽径比40％、詳細は下記参照）
液種 ： 水（密度1000kg/m3、粘度1cP）
水温 ： 12℃
液量 ： 26.1Ｌ
インターナル ： 邪魔板-平板４枚（幅24.8mm)、通気ノズル１本
動力 ： 1.0 kW/m3（無通気時）
回転数 ： 本実施形態の撹拌翼627rpm（一定）、
汎用ディスクタービン翼350rpm（一定）
通気気体 ： 試験実施箇所の周囲大気
通気量 ： 0〜3vvmThe test conditions are as follows.
Test tank: Transparent acrylic tank (vessel inner diameter 310mm, 2: 1 semi-elliptical bottom)
Blade type: Stirring blade of this embodiment, (Comparison object) General-purpose disk turbine blade
Blade diameter 124mm (ratio of tank diameter 40%, see below for details)
Liquid type: Water (density 1000kg / m3, viscosity 1cP)
Water temperature: 12 ℃
Liquid volume: 26.1L
Internal: Baffle plate-4 flat plates (width 24.8mm), 1 ventilation nozzle Power: 1.0 kW / m3 (no ventilation)
Rotational speed: 627 rpm (constant) of the stirring blade of this embodiment,
General-purpose disc turbine blade 350rpm (constant)
Aeration gas: Ambient air around the test location Aeration volume: 0-3vvm

性能試験に供した本実施形態の撹拌翼４はステンレス鋼（ＳＵＳ３０４）製で、図２（ａ）（ｂ）及び図３に示す形状である。主要部分のサイズは以下の通りであり、図４（ａ）（ｂ）に各部寸法（ｍ１〜ｍ７）の位置を示す。
・支持部４２の直径 （ｍ１）： 124mm
・支持部４２の板厚 （ｍ２）： 2mm
・第１の羽根部４３ａ及び第２の羽根部４３ｂの後退角度 （α）： 30°
・第１の羽根部４３ａの先端から第２の羽根部４３ｂの先端までの軸方向寸法 （ｍ３）： 22.5mm
・第１の羽根部４３ａ及び第２の羽根部４３ｂの、根元から先端までの図２（ｂ）に示す一点鎖線間の寸法 （ｍ４）： 31.8mm
・第２の羽根部４３ｂの支持部４２側の面までの曲率半径 （ｍ５）： 49.2mm
・支持部４２の外周縁から各羽根部４３ａ，４３ｂの径内側端縁までの、後退角度αの方向に沿う寸法 （ｍ６）： 31.9mm
・支持部４２の外周縁から開口部４４の径内側端縁までの、後退角度αの方向に沿う寸法 （ｍ７）： 13.5mmThe stirring blade 4 of the present embodiment subjected to the performance test is made of stainless steel (SUS304) and has the shape shown in FIGS. The size of the main part is as follows, and the positions of the dimensions (m1 to m7) are shown in FIGS.
-Diameter of support part 42 (m1): 124mm
・ Thickness of support part 42 (m2): 2mm
-Retraction angle of the first blade portion 43a and the second blade portion 43b (α): 30 °
-Axial dimension from the tip of the first blade portion 43a to the tip of the second blade portion 43b (m3): 22.5 mm
・ Dimension between the alternate long and short dash line shown in FIG. 2B from the root to the tip of the first blade portion 43a and the second blade portion 43b (m4): 31.8 mm
-Curvature radius to the surface of the second blade portion 43b on the support portion 42 side (m5): 49.2mm
・ Dimension along the direction of the receding angle α from the outer peripheral edge of the support part 42 to the inner edge of each blade part 43a, 43b (m6): 31.9mm
-Dimension along the direction of the receding angle α from the outer peripheral edge of the support portion 42 to the inner edge of the opening 44 (m7): 13.5 mm

また、比較対象として用いた汎用ディスクタービン翼は、円盤状であるディスクの直径が99mmで、羽根はディスクの径方向に沿って配置された長方形板状のもので、ディスクの円周方向に等間隔で６つ配置され、羽根先端の径寸法が124mmであり、各羽根は縦寸法が25mm、横寸法が30mmである。   In addition, the general-purpose disk turbine blade used as a comparative object has a disk-like disk diameter of 99 mm, and the blades are rectangular plates arranged along the disk radial direction, such as in the disk circumferential direction. Six blades are arranged at intervals, the diameter of the blade tip is 124 mm, and each blade has a vertical dimension of 25 mm and a horizontal dimension of 30 mm.

性能試験は、無通気時の動力を両翼とも1.0 kW/m3とした上で、通気量を0〜3vvmに変化させて行った。図５に記載した上側のグラフは、通気量とkLa（総括物質移動容量係数）との関係を示すグラフである。kLaは数値が大きいほど、液体に対して気体が多く溶解することを示す。また、図５に記載した下側のグラフは、通気量と液体に伝達される動力（液体の単位体積当たり）との関係を示すグラフである。各グラフから明らかなように、通気量が同じ場合、比較対象である汎用ディスクタービン翼（グラフ上、四角プロットを結んだ線）に比べて本実施形態の撹拌翼４（同丸プロットを結んだ線）は、kLaが大きく、かつ、液体に伝達される動力が大きい（つまり、動力低下が小さい）ことが明白である。   The performance test was performed by changing the air flow rate from 0 to 3 vvm after setting the power during no ventilation to 1.0 kW / m3 for both wings. The upper graph shown in FIG. 5 is a graph showing the relationship between the air flow rate and kLa (overall mass transfer capacity coefficient). The larger the numerical value of kLa, the more gas is dissolved in the liquid. The lower graph shown in FIG. 5 is a graph showing the relationship between the amount of ventilation and the power (per unit volume of liquid) transmitted to the liquid. As is clear from each graph, when the air flow rate is the same, the agitating blade 4 of the present embodiment (the same circle plot is connected) as compared with the general-purpose disk turbine blade (a line connecting the square plot on the graph) as a comparison target. The line) clearly shows that kLa is large and the power transmitted to the liquid is large (that is, the power drop is small).

以上、本実施形態の撹拌翼４は汎用ディスクタービン翼よりも優れることが性能試験により裏付けられた。   As described above, it was confirmed by the performance test that the stirring blade 4 of this embodiment is superior to the general-purpose disk turbine blade.

本実施形態に係る撹拌翼４及び撹拌装置１は以上の通りであるが、本発明に係る撹拌翼及び撹拌装置は、上記実施形態に限定されるものではなく、本発明の要旨を逸脱しない範囲で種々の変更を加えることができる。また、本発明に係る撹拌翼４及び撹拌装置１の作用効果は、上記した作用効果に限定されるものでもない。   The stirring blade 4 and the stirring device 1 according to the present embodiment are as described above. However, the stirring blade and the stirring device according to the present invention are not limited to the above embodiment, and do not depart from the gist of the present invention. Various changes can be made. Moreover, the effect of the stirring blade 4 and the stirring apparatus 1 which concerns on this invention is not limited to an above-described effect.

上記実施形態では、撹拌翼４として、羽根部４３を円周方向に等間隔に６つ有する例を挙げたが、これに限定されるものではない。その他例えば、羽根部４３の数量は、例えば等間隔に４〜８つの間で適宜設定することができる。また、羽根部４３間の間隔を適宜異なるものに設定することもできる。   In the embodiment described above, an example in which six blade portions 43 are provided at equal intervals in the circumferential direction as the stirring blade 4 is described, but the present invention is not limited thereto. In addition, for example, the quantity of the blade | wing part 43 can be suitably set between 4-8, for example at equal intervals. Moreover, the space | interval between the blade | wing parts 43 can also be set to a different thing suitably.

また、上記実施形態では、頂部２３側から底部２２側に見て撹拌軸３及び撹拌翼４が反時計回りに回転する例を挙げたが、その他、撹拌軸３及び撹拌翼４が時計回りに回転する態様を採用してもよい。この場合、被撹拌物の流動について、上記実施形態とは逆の流動が得られる。   Moreover, in the said embodiment, although the stirring shaft 3 and the stirring blade 4 rotated counterclockwise seeing from the top part 23 side to the bottom part 22 side, the stirring shaft 3 and the stirring blade 4 were rotated clockwise. You may employ | adopt the aspect which rotates. In this case, the flow of the object to be stirred is the reverse of the flow of the above embodiment.

また、本発明に係る撹拌翼及び撹拌装置が適用される用途は、特に限定されるものではない。例えば、本発明の撹拌翼及び撹拌装置は、気液の物質移動を伴う反応操作に使用される。かかる反応操作としては、水素添加反応槽、酸化反応槽等におけるガス吸収反応操作が挙げられる。その他、ゴム重合後の脱溶剤反応槽やフラッシュ晶出反応槽などにおける、蒸気が存在する中での反応操作等も挙げられる。さらに、分離・抽出操作にも使用され得る。   Moreover, the use to which the stirring blade and the stirring apparatus according to the present invention are applied is not particularly limited. For example, the stirring blade and the stirring device of the present invention are used for a reaction operation involving gas-liquid mass transfer. Examples of such a reaction operation include a gas absorption reaction operation in a hydrogenation reaction tank, an oxidation reaction tank or the like. In addition, a reaction operation in the presence of steam in a solvent removal reaction tank or a flash crystallization reaction tank after rubber polymerization can also be mentioned. Furthermore, it can also be used for separation / extraction operations.

本実施形態に関してまとめて記載する。本実施形態に係る撹拌翼４は、撹拌装置１に備えられた撹拌軸３に取り付けられる撹拌翼４であって、前記撹拌軸３に取り付けられる板状の支持部４２と、該支持部４２の外周縁側に配された複数の羽根部４３とを備え、前記支持部４２は、第１の面と第２の面とを有し、前記各羽根部４３は、前記支持部４２における前記第１の面及び前記第２の面のうちの一方の面から突出する第１の羽根部４３ａと、前記支持部４２における前記第１の面及び前記第２の面のうちの他方の面から突出するとともに、第１の羽根部４３ａとは非対称とされる第２の羽根部４３ｂと、前記第１の羽根部４３ａと前記第２の羽根部４３ｂの少なくとも一方に形成される開口部４４とを含む。   This embodiment will be described collectively. The stirring blade 4 according to this embodiment is a stirring blade 4 attached to the stirring shaft 3 provided in the stirring device 1, and includes a plate-like support portion 42 attached to the stirring shaft 3, and the support portion 42. A plurality of blade portions 43 arranged on the outer peripheral edge side, the support portion 42 has a first surface and a second surface, and each blade portion 43 is the first portion in the support portion 42. Projecting from one of the first surface and the second surface, and projecting from the other of the first surface and the second surface of the support portion 42. A second blade portion 43b that is asymmetric with the first blade portion 43a, and an opening 44 formed in at least one of the first blade portion 43a and the second blade portion 43b. .

かかる構成によれば、第１及び第２の羽根部４３ａ，４３ｂと支持部４２との隙間部分（Ｓ）の被撹拌物が遠心力で開口部４４へと移動した後、上記開口部４４を通過する被撹拌物に合流して、羽根部４３よりも外周側に分散される。このような被撹拌物の流動により、第１及び第２の羽根部４３ａ，４３ｂと支持部４２との隙間部分での被撹拌物の集合及び滞留が抑制されるため、キャビテーションを抑制することができる。また、開口部４４を被撹拌物が通過する分だけ羽根部４３が受ける抵抗が減少するため、撹拌翼４の駆動力を低減することもできる。   According to this structure, after the to-be-stirred thing of the clearance gap part (S) between the 1st and 2nd blade | wing parts 43a and 43b and the support part 42 moves to the opening part 44 with a centrifugal force, the said opening part 44 is used. It merges with the material to be stirred and is dispersed on the outer peripheral side of the blade portion 43. By such a flow of the agitated material, the aggregation and retention of the agitated material in the gap portion between the first and second blade portions 43a and 43b and the support portion 42 are suppressed, so that cavitation can be suppressed. it can. Moreover, since the resistance which the blade | wing part 43 receives by the part to which a to-be-stirred object passes the opening part 44 reduces, the driving force of the stirring blade 4 can also be reduced.

また、上記構成の撹拌翼４においては、前記支持部４２は円形に構成され、前記複数の羽根部４３は、支持部４２の円周方向に沿って所定の間隔をおいて設けられており、前記支持部４２の円周方向において隣り合う２つの羽根部４３，４３のうち、一方の羽根部４３における前記第１の羽根部４３ａが前記支持部４２の第１の面に設けられるとともに、他方の羽根部４３における前記第１の羽根部４３ａが前記支持部４２の第２の面に設けられ、前記一方の羽根部４３における前記第２の羽根部４３ｂが前記支持部４２の第２の面に設けられるとともに、前記他方の羽根部における前記第２の羽根部が前記支持部の第１の面に設けられることができる。   Further, in the stirring blade 4 configured as described above, the support portion 42 is configured in a circular shape, and the plurality of blade portions 43 are provided at predetermined intervals along the circumferential direction of the support portion 42. Of the two blade portions 43 and 43 adjacent to each other in the circumferential direction of the support portion 42, the first blade portion 43 a in one blade portion 43 is provided on the first surface of the support portion 42, and the other The first blade portion 43a of the blade portion 43 is provided on the second surface of the support portion 42, and the second blade portion 43b of the one blade portion 43 is the second surface of the support portion 42. And the second blade portion of the other blade portion may be provided on the first surface of the support portion.

かかる構成によれば、仮に大量のガス存在下でキャビティが発生しても隣り合う羽根部４３，４３の背面のキャビティ（ガス溜まり）が結合しにくくなり、例えば液体中にガスが大量に存在する場合においても動力低下及び撹拌性能の低下を抑えることが可能となる。   According to such a configuration, even if a cavity is generated in the presence of a large amount of gas, the cavities (gas reservoirs) on the back surfaces of the adjacent blade portions 43 and 43 are difficult to be coupled. For example, a large amount of gas exists in the liquid. Even in this case, it is possible to suppress a decrease in power and a decrease in stirring performance.

また、非対称とされる第１の羽根部４３ａと第２の羽根部４３ｂについて、例えば、第１の羽根部４３ａが直線形状に形成され、第２の羽根部４３ｂが湾曲形状に形成される構成を採用してもよい。   In addition, for example, the first blade portion 43a and the second blade portion 43b that are asymmetric are configured such that the first blade portion 43a is formed in a linear shape and the second blade portion 43b is formed in a curved shape. May be adopted.

以上の通り、本実施形態によれば、撹拌効率が向上された撹拌翼４３及びこの撹拌翼４３を備えた撹拌装置１が提供される。   As described above, according to the present embodiment, the stirring blade 43 with improved stirring efficiency and the stirring device 1 including the stirring blade 43 are provided.

１：撹拌装置、２：撹拌槽、３：撹拌軸、４：撹拌翼、４１：ボス部、４１ａ：貫通孔、４２：支持部、４３：羽根部、４３ａ：第１の羽根部、４３ｂ：第２の羽根部、４４：開口部、α：傾斜角度、Ｌ：液体（被撹拌物）、Ｇ：気体（被撹拌物）、Ａ：軸芯方向、Ｂ：径方向 1: stirring device, 2: stirring tank, 3: stirring shaft, 4: stirring blade, 41: boss portion, 41a: through hole, 42: support portion, 43: blade portion, 43a: first blade portion, 43b: Second blade part, 44: opening, α: inclination angle, L: liquid (object to be stirred), G: gas (object to be stirred), A: axial direction, B: radial direction

Claims (4)

撹拌装置に備えられた撹拌軸に取り付けられる撹拌翼であって、
前記撹拌軸に取り付けられる板状の支持部と、該支持部の外周縁側に配された複数の羽根部とを備え、
前記支持部は、第１の面と第２の面とを有し、
前記各羽根部は、
前記支持部における前記第１の面及び前記第２の面のうちの一方の面から突出する第１の羽根部と、
前記支持部における前記第１の面及び前記第２の面のうちの他方の面から突出するとともに、第１の羽根部とは非対称とされる第２の羽根部と、
前記第１の羽根部と前記第２の羽根部の少なくとも一方に形成される開口部とを含み、
前記開口部は、前記第１の羽根部または前記第２の羽根部の根元側かつ径外側の所定領域が切り取られて形成され、被撹拌物が通過する空間を有する撹拌翼。 A stirring blade attached to a stirring shaft provided in the stirring device,
A plate-like support portion attached to the stirring shaft, and a plurality of blade portions disposed on the outer peripheral edge side of the support portion,
The support portion has a first surface and a second surface,
Each of the blades is
A first blade portion protruding from one of the first surface and the second surface of the support portion;
A second blade portion that protrudes from the other surface of the first surface and the second surface of the support portion and is asymmetric with the first blade portion;
Look including an opening formed on at least one of said second blade section and the first blade part,
The opening is a stirring blade having a space in which a predetermined region on the base side and outside of the diameter of the first blade portion or the second blade portion is cut out and has a space through which an object to be stirred passes . 撹拌装置に備えられた撹拌軸に取り付けられる撹拌翼であって、
前記撹拌軸に取り付けられる板状の支持部と、該支持部の外周縁側に配された複数の羽根部とを備え、
前記支持部は、第１の面と第２の面とを有し、
前記各羽根部は、
前記支持部における前記第１の面及び前記第２の面のうちの一方の面から突出する第１の羽根部と、
前記支持部における前記第１の面及び前記第２の面のうちの他方の面から突出するとともに、第１の羽根部とは非対称とされる第２の羽根部と、
前記第１の羽根部と前記第２の羽根部の少なくとも一方に形成される開口部とを含み、
前記支持部は円形に構成され、
前記複数の羽根部は、前記支持部の円周方向に沿って所定の間隔をおいて設けられており、
前記支持部の円周方向において隣り合う２つの羽根部のうち、一方の羽根部における前記第１の羽根部が前記支持部の第１の面に設けられるとともに、他方の羽根部における前記第１の羽根部が前記支持部の第２の面に設けられ、前記一方の羽根部における前記第２の羽根部が前記支持部の第２の面に設けられるとともに、前記他方の羽根部における前記第２の羽根部が前記支持部の第１の面に設けられる撹拌翼。 A stirring blade attached to a stirring shaft provided in the stirring device,
A plate-like support portion attached to the stirring shaft, and a plurality of blade portions disposed on the outer peripheral edge side of the support portion,
The support portion has a first surface and a second surface,
Each of the blades is
A first blade portion protruding from one of the first surface and the second surface of the support portion;
A second blade portion that protrudes from the other surface of the first surface and the second surface of the support portion and is asymmetric with the first blade portion;
Including an opening formed in at least one of the first blade portion and the second blade portion,
The support portion is configured in a circular shape,
The plurality of blade portions are provided at predetermined intervals along the circumferential direction of the support portion,
Of the two blade portions adjacent in the circumferential direction of the support portion, the first blade portion in one blade portion is provided on the first surface of the support portion, and the first blade portion in the other blade portion. Is provided on the second surface of the support portion, the second blade portion in the one blade portion is provided on the second surface of the support portion, and the second blade portion in the other blade portion. 2 of the blade section that is provided on the first face of the support portion 撹拌翼. 前記第１の羽根部は径方向視にて直線形状に形成され、前記第２の羽根部は径方向視にて湾曲形状に形成される、請求項１又は２に記載の撹拌翼。   The stirring blade according to claim 1 or 2, wherein the first blade portion is formed in a linear shape when viewed in the radial direction, and the second blade portion is formed in a curved shape when viewed in the radial direction. 請求項１から３のいずれか１項に記載の撹拌翼を備えた撹拌装置。   The stirring apparatus provided with the stirring blade of any one of Claim 1 to 3.
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CN205868121U (en) 2017-01-11
EP3088075A4 (en) 2017-10-04
EP3088075A1 (en) 2016-11-02
KR200487606Y1 (en) 2018-10-11
JPWO2015098290A1 (en) 2017-03-23
EP3088075B1 (en) 2022-01-05
WO2015098290A1 (en) 2015-07-02
TW201529155A (en) 2015-08-01
TWM504636U (en) 2015-07-11
KR20160002993U (en) 2016-08-30

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